Buk District () is a gu, or district, in north central Ulsan, South Korea. It stretches roughly from the Ring Road to Mohwa into the north and out to the coast in the east.
149,676 people live in Buk-gu's 80.41 km<sup>2</sup>. 77,214 of these are Korean males, 71,183 are Korean females, 961 are foreign males and 318 are foreign females (2006). In no dong do women outnumber men.
The dong of Buk-gu are:
Jeongja Beach () is the most popular in Ulsan and there are several raw fish restaurants and pleasant western restaurants-come-bars lining the coast road around here. Most people in Ulsan go here infrequently, however, as it lies at the other end of a twisted road over the hills just south of Muryongsan (), Ulsan's second-highest hill.
Jujeon Mongdol beach () is a beach that connects Jujeon () and Gangdong () and its length is about 1.5 km. It was also selected as one of the "12 must-see natural sights of Ulsan2 by Ulsan Metropolitan Government. Different from most beaches that are covered with sand, Junjeon Mongdol beach is covered with smooth pebble stones. Especially the seaside course that connects Jujeon ()-Jengja ()-Gangdong () is well known for the best drive course of Ulsan.
Transport in Buk-gu is simple, as most of the population are in striking distance of either the Ring Road or National Road 7, which is the main road up the East Coast of South Korea and which, at this point, connects Ulsan with Gyeongju to the north. Ulsan's domestic airport (IATA Code: USN), which serves Seoul is located in Buk-gu.
List of districts in South Korea Buk-gu, Ulsan (South Korea electorate)